Suspension bridge central buckle with buffer reset function

Abstract

A kind of suspension bridge central buckle with buffer reset function, the suspension bridge central buckle with buffer reset function includes two central buckle components, cable clamp and main truss;The bottom of the cable clamp is connected with one end of two central buckle components respectively, the other end of two central buckle components is connected with main truss, and two central buckle components are symmetrically inclined and arranged with cable clamp as center;The central buckle component includes upper hanging lug plate, upper connecting rod, buffer component, screw rod component, lower connecting rod and lower hanging lug plate, one end of the upper connecting rod is inserted with upper hanging lug plate, one end of lower connecting rod is inserted with lower hanging lug plate, and gap area is arranged between the other end of upper connecting rod and the other end of lower connecting rod;Multiple screw rod components are arranged between the upper connecting rod and the lower connecting rod in the gap area.The central buckle of the design can reset after strong earthquake, without needing to replace any component and additional maintenance, effectively improve the safety of bridge use.

Description

Technical Field

[0001] This invention relates to an improvement in the central fastening technology for suspension bridges, belonging to the field of bridge engineering, and particularly to a central fastening for suspension bridges with a buffer reset function. Background Technology

[0002] To improve the fatigue performance of short suspension cables in the mid-span of suspension bridges, increase the longitudinal stiffness of the bridge structure, and reduce the displacement of the steel truss girder ends under seismic loading, a herringbone-shaped central buckle is generally installed at the mid-span of the main cable to form a cable-girder connection. Currently, there are three main types of central buckles: rigid central buckles, which use a rigid truss to connect the main cable to the steel truss stiffening girder; flexible central buckles, which use inclined suspension cables to establish longitudinal constraints between the main cable and the steel truss stiffening girder; and buckling-resistance steel-braced energy-dissipating central buckles, an improvement on ordinary rigid central buckles. This type of central buckle operates elastically under normal operating conditions and E1 seismic loading, but yields without buckling under E2 seismic loading, achieving tensile and compressive energy dissipation and ensuring the connection of the stiffening girder and cable clamps. The components are in an elastic working state, and the rigid central buckle is firmly supported by the force. However, under strong earthquakes and strong external forces, due to the lack of buffering, the stress on the main cable and steel truss increases significantly, resulting in severe damage or even destruction of the steel truss and central buckle components. The flexible central buckle, due to the characteristic that the suspenders are only under tension and not compression, has a large longitudinal displacement during strong earthquakes, which may lead to suspender breakage and failure. The buckling-resistance steel-supported energy-dissipating central buckle has a greatly reduced stiffness after yielding after a strong earthquake, and its stiffness cannot meet the requirements of normal operation. The central buckle cannot be reset after a strong earthquake.

[0003] Chinese patent application CN 202010157209.4, filed on March 9, 2020, discloses a novel central buckle device for suspension bridges, including a cable clamp, an upper pulley for the cable, a double-strand cable, a vibration damping frame, a lower pulley for the cable, a double-strand cable fixing device, a spatial diagonal bar, a viscous damper, and a spatial diagonal bar fixing device. The cable clamp is fixed to the mid-span of the main cable of the suspension bridge, and the upper pulley for the cable and the upper end of the diagonal bar are fixed to the cable clamp. The double-strand cable forms a closed loop through the upper and lower pulleys, with several vibration damping frames in the middle. The viscous damper is fixed to the middle of the diagonal bar. This invention reduces the longitudinal vibration of the short cable by forming a closed loop through the upper and lower pulleys, setting a vibration damping frame, and setting a viscous damper on the diagonal bar, thus preventing damage to the cable anchor head due to longitudinal reciprocating motion. This invention also reduces the lateral vibration of the short cable by setting a spatial diagonal bar. However, the prior art still does not solve the problem of the central buckle resetting after a strong earthquake.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this patent application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem in the prior art that the central buckle cannot be reset after a strong earthquake, and to provide a central buckle for suspension bridges with a buffer reset function that can reset the central buckle after a strong earthquake.

[0006] To achieve the above objectives, the technical solution of the present invention is: a central buckle for a suspension bridge with a buffer reset function, wherein the central buckle for a suspension bridge with a buffer reset function includes two central buckle components, cable clamps and a main truss;

[0007] The bottom of the cable clamp is connected to one end of each of the two central buckle components, and the other end of the two central buckle components is connected to the main truss. The two central buckle components are symmetrically inclined with the cable clamp as the center.

[0008] The central buckle assembly includes an upper lifting lug plate, an upper connecting rod, a buffer assembly, a screw assembly, a lower connecting rod, and a lower lifting lug plate. One end of the upper connecting rod is inserted into the upper lifting lug plate, and one end of the lower connecting rod is inserted into the lower lifting lug plate. A gap area is provided between the other ends of the upper and lower connecting rods.

[0009] Multiple sets of screw assemblies are arranged in the gap area between the upper connecting rod and the lower connecting rod. A buffer assembly is arranged inside the multiple sets of screw assemblies in the gap area. The two ends of the buffer assembly are connected to the upper connecting rod and the lower connecting rod, respectively.

[0010] A proximity switch is provided in the gap area, and the proximity switch is located on the outside of the screw assembly;

[0011] The upper and lower hanging ear plates have the same structure and are arranged symmetrically.

[0012] The lower connecting rod has a slot on its side, the buffer assembly is installed in the slot, and one end of the lower lifting lug is inserted into the slot.

[0013] The lower lug plate includes a working end, a connecting end, and an insertion end. One end of the insertion end is installed in the slot, and the other end of the insertion end extends to the outside of the slot and connects to one end of the connecting end. The other end of the connecting end is connected to one end of the working end.

[0014] The buffer assembly includes a disc spring assembly, a disc spring shaft, a washer, and a retaining ring. The disc spring assembly is provided on the side of the disc spring shaft. One end of the side of the disc spring shaft is connected to one end of the washer, and the other end of the disc spring shaft is connected to one end of the retaining ring. The retaining ring is connected to the upper connecting rod.

[0015] The disc spring shaft includes an end face base, a round shaft and a protective sleeve. One end of the round shaft is connected to the side of the end face base. The side of the end face base is provided with a protective sleeve on the outside of the round shaft. The protective sleeve is embedded in a slot. The disc spring assembly is set on the side of the round shaft.

[0016] A nut is provided at the other end of the circular shaft, and the retaining ring is connected and fixed to the circular shaft by the nut.

[0017] A washer is provided between the nut and the retaining ring.

[0018] Multiple sets of the aforementioned screw assemblies are arranged in a surrounding manner within the gap area, and each set of screw assemblies includes two locking nuts, two locking washers, and double-ended studs;

[0019] Two circumferential flanges are provided on opposite sides of the upper connecting rod and the lower connecting rod;

[0020] Both of the circumferential flanges have through-holes on their sides. The two ends of the double-ended studs pass through the two through-holes and extend to the outside of the circumferential flanges. The end of the double-ended stud located on the outside of the circumferential flanges is fixed by a lock nut.

[0021] A proximity switch is installed on the inner side of the through-hole on the circumferential flange, and the proximity switch is located on the outer side of the double-ended stud.

[0022] A bushing is provided on the circumferential flange inside the through-hole. The two ends of the double-ended stud pass through the two bushings respectively and extend to the outside. The double-ended stud and the bushing are clearance-fitted.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In this invention, a central tie of a suspension bridge with a buffer reset function is provided. One end of the upper connecting rod is connected to an upper lifting lug, and one end of the lower connecting rod is connected to a lower lifting lug. A gap area is provided between the other ends of the upper and lower connecting rods. Multiple sets of screw assemblies are arranged within this gap area between the upper and lower connecting rods. A buffer assembly is arranged inside the screw assemblies within the gap area. Both ends of the buffer assembly are connected to the upper and lower connecting rods, respectively. The buffer assembly provides cushioning for the central tie structure under strong earthquakes and external forces, solving the problem of stress damage and destruction of the steel truss and central tie components caused by overload in existing suspension bridge central tie structures. After the overload is released, the central tie can reset after a strong earthquake without the need for any component replacement or additional maintenance, effectively improving the safety of bridge use and reducing costs. Therefore, this design allows for reset and is safe to use.

[0025] 2. In a central fastener of a suspension bridge with a buffer reset function, the present invention includes a disc spring assembly, a disc spring shaft, a washer, and a retaining ring. A disc spring assembly is mounted on the side of the disc spring shaft. One end of the side of the disc spring shaft is connected to one end of the washer, and the other end of the disc spring shaft is connected to one end of the retaining ring. The retaining ring is connected to an upper connecting rod. The disc spring shaft includes an end face base, a round shaft, and a protective sleeve. One end of the round shaft is connected to the side of the end face base. The side of the end face base, located outside the round shaft, is provided with a protective sleeve, which is embedded in a slot. The spring assembly is mounted on the side of the round shaft, which has an external thread at its upper end. The disc spring assembly is coaxial with the disc spring shaft, and the round shaft serves as a guide for the disc spring assembly. The clearance between the round shaft and the disc spring assembly, as well as the surface hardness, should meet the requirements for disc spring use. A protective sleeve around the perimeter prevents the disc spring assembly from being contaminated by external debris and dust. The gasket, disc spring shaft, and disc spring assembly all require surface strengthening treatment to meet fatigue life requirements under variable loads. A certain amount of pre-compression deformation is achieved by tightening the disc spring assembly with a nut to realize the preset force required for the central buckle. Therefore, this design is simple to operate and stable in use.

[0026] 3. In the central fastener of a suspension bridge with buffer reset function, a proximity switch is installed on the inner side of the through-hole on the circumferential flange, and the proximity switch is located on the outer side of the double-ended stud. A bushing is installed on the circumferential flange inside the through-hole. The two ends of the double-ended stud pass through the two bushings and extend to the outer side. The double-ended stud and the bushing are in clearance fit. Both the upper and lower connecting rods on both sides can compress the disc spring assembly under overload, and slide axially when the distance between the two circumferential flanges decreases. Adjusting the proximity switch so that when the central fastener is overloaded and the axial distance between the upper and lower connecting rods changes, the proximity switch can issue an alarm signal. The strength of the disc spring assembly must meet the ultimate load requirements under strong earthquakes and external forces, and the axial displacement generated by compression under ultimate load should not damage the proximity switch. Therefore, this design can provide intelligent alarm and has strong pressure resistance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the cable clamp structure in this invention.

[0029] Figure 3 This is a schematic diagram of the structure of the lower hanging lug plate in this invention.

[0030] Figure 4 This is a schematic diagram of the buffer component in this invention.

[0031] Figure 5 This is a schematic diagram of the screw assembly in this invention.

[0032] In the diagram: Central buckle assembly A, cable clamp B, main truss C, upper lifting lug 1, upper connecting rod 2, buffer assembly 3, disc spring assembly 31, disc spring shaft 32, end face base 321, round shaft 322, protective sleeve 323, gasket 33, retaining ring 34, washer 35, nut 36, screw assembly 4, locking nut 41, locking washer 42, double-ended stud 43, bushing 44, lower connecting rod 5, slot 51, gap area 52, through port 53, circumferential flange 54, lower lifting lug 6, working end 61, connecting end 62, insertion end 63, proximity switch 7. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See Figures 1 to 5 A central buckle for a suspension bridge with a buffer reset function, the central buckle for a suspension bridge with a buffer reset function includes two central buckle components A, a cable clamp B and a main truss C;

[0035] The bottom of the cable clamp B is connected to one end of each of the two central buckle components A, and the other end of the two central buckle components A is connected to the main truss C. The two central buckle components A are symmetrically inclined with the cable clamp B as the center.

[0036] The central buckle assembly A includes an upper hanging lug plate 1, an upper connecting rod 2, a buffer assembly 3, a screw assembly 4, a lower connecting rod 5, and a lower hanging lug plate 6. One end of the upper connecting rod 2 is inserted into the upper hanging lug plate 1, and one end of the lower connecting rod 5 is inserted into the lower hanging lug plate 6. A gap area 52 is provided between the other end of the upper connecting rod 2 and the other end of the lower connecting rod 5.

[0037] Multiple sets of screw assemblies 4 are provided in the gap area 52 between the upper connecting rod 2 and the lower connecting rod 5. A buffer assembly 3 is provided inside the multiple sets of screw assemblies 4 in the gap area 52. The two ends of the buffer assembly are connected to the upper connecting rod 2 and the lower connecting rod 5, respectively.

[0038] A proximity switch 7 is provided in the gap area 52, and the proximity switch 7 is located on the outside of the screw assembly 4;

[0039] The upper hanging ear plate 1 and the lower hanging ear plate 6 have the same structure, and the upper hanging ear plate 1 and the lower hanging ear plate 6 are arranged symmetrically.

[0040] The lower connecting rod 5 has a slot 51 on its side, the buffer assembly 3 is installed in the slot 51, and one end of the lower hanging ear plate 6 is inserted into the slot 51.

[0041] The lower hanging lug 6 includes a working end 61, a connecting end 62 and an insertion end 63. One end of the insertion end 63 is installed in the slot 51, and the other end of the insertion end 63 extends to the outside of the slot 51 and connects to one end of the connecting end 62. The other end of the connecting end 62 is connected to one end of the working end 61.

[0042] The buffer assembly 3 includes a disc spring assembly 31, a disc spring shaft 32, a washer 33, and a retaining ring 34. The disc spring assembly 31 is provided on the side of the disc spring shaft 32. One end of the side of the disc spring shaft 32 is connected to one end of the washer 33, and the other end of the disc spring shaft 32 is connected to one end of the retaining ring 34. The retaining ring 34 is connected to the upper connecting rod 2.

[0043] The disc spring shaft 32 includes an end face base 321, a round shaft 322 and a protective sleeve 323. One end of the round shaft 322 is connected to the side of the end face base 321. The side of the end face base 321 is located outside the round shaft 322 and the protective sleeve 323 is provided. The protective sleeve 323 is embedded in the slot 51. The disc spring assembly 31 is provided on the side of the round shaft 322.

[0044] The other end of the circular shaft 322 is provided with a nut 36, and the retaining ring 34 is connected and fixed to the circular shaft 322 by the nut 36.

[0045] A washer 35 is provided between the nut 36 and the retaining ring 34.

[0046] Multiple sets of the screw assemblies 4 are arranged around the gap area 52, and each set of screw assemblies 4 includes two locking nuts 41, two locking washers 42 and double-ended studs 43;

[0047] Two circumferential flanges 54 are provided on opposite sides of the upper connecting rod 2 and the lower connecting rod 5;

[0048] Both of the two circumferential flanges 54 have through holes 53 on their sides. The two ends of the double-ended stud 43 pass through the two through holes 53 and extend to the outside of the circumferential flange 54. The end of the double-ended stud 43 located on the outside of the circumferential flange 54 is fixed by a lock nut 41.

[0049] A proximity switch 7 is installed on the circumferential flange 54 inside the through-hole 53, and the proximity switch 7 is located outside the double-ended stud 43.

[0050] A bushing 44 is provided on the circumferential flange 54 within the through-hole 53. The two ends of the double-ended stud 43 pass through the two bushings 44 respectively and extend to the outside. The double-ended stud 43 and the bushing 44 are clearance-fitted.

[0051] The principle of this invention is explained as follows: By setting the required preload force on the buffer assembly 3, under strong vibration and strong external force, when the force on the upper hanging lug 1 or the lower hanging lug 6 exceeds the preset force, the upper connecting rod 2 or the lower connecting rod 5 will compress the disc spring assembly 31 on the outside of the round shaft 322, buffer the external force, and then transmit it to the corresponding components, thereby reducing the strong impact on each component and avoiding damage and destruction to the components of the central buckle. Then, when the axial distance between the upper connecting rod 2 and the lower connecting rod 5 changes to the set range, the proximity switch 7 issues an alarm signal. After the overload is released, finally, under the action of the preload force of the disc spring assembly 31, the disc spring assembly 31 pushes the upper connecting rod 2 and the lower connecting rod 5 to reset, and the central buckle structure returns to normal working state.

[0052] Example 1:

[0053] A central fastener for a suspension bridge with a buffer and reset function includes two central fastener components A, cable clamps B, and a main truss C. The bottom of each cable clamp B is connected to one end of one of the two central fastener components A, and the other end of each central fastener component A is connected to the main truss C. The two central fastener components A are symmetrically inclined about the cable clamps B. Each central fastener component A includes an upper lifting lug 1, an upper connecting rod 2, a buffer component 3, a screw component 4, a lower connecting rod 5, and a lower lifting lug 6. One end of the upper connecting rod 2 is inserted into the upper lifting lug 1, and one end of the lower connecting rod 5... The upper connecting rod 2 is connected to the lower connecting rod 5 by a lower hanging lug 6. A gap area 52 is provided between the other end of the upper connecting rod 2 and the other end of the lower connecting rod 5. Multiple sets of screw assemblies 4 are provided between the upper connecting rod 2 and the lower connecting rod 5 within the gap area 52. A buffer assembly 3 is provided inside the multiple sets of screw assemblies 4 within the gap area 52. The two ends of the buffer assembly are connected to the upper connecting rod 2 and the lower connecting rod 5, respectively. A proximity switch 7 is provided within the gap area 52 and is located outside the screw assembly 4. The upper hanging lug 1 and the lower hanging lug 6 have the same structure and are symmetrically arranged.

[0054] In application: Under strong earthquakes and external forces, when the upper hanging lug 1 or lower hanging lug 6 on the central buckle assembly A is subjected to a force exceeding the preset force, the upper hanging lug 1 pushes the upper connecting rod 2 to move axially along the direction of the lower connecting rod 5, and the lower hanging lug 6 pushes the lower connecting rod 5 to move axially along the direction of the upper connecting rod 2. The upper connecting rod 2 and the lower connecting rod 5 will compress the buffer assembly 3. While moving, the screw assembly 4 guides the movement, limiting the position and angle of the axial displacement. The external force is buffered by the buffer assembly 3 and then transmitted to the other side of the upper connecting rod 2 or the lower connecting rod 5 and the corresponding components, thereby reducing the strong impact on each component and avoiding damage and destruction to the components of the central buckle. At the same time, due to the compression of the buffer assembly 3 beyond the pre-compression deformation, the axial distance between the upper connecting rod 2 and the lower connecting rod 5 changes. When the upper connecting rod 2 moves to the contact proximity switch 7, an alarm signal is issued. After the overload is released, under the action of the pre-tightening force of the buffer assembly 3, the upper connecting rod 2 and the lower connecting rod 5 reset, and the central buckle assembly A returns to normal working state.

[0055] Example 2

[0056] Example 2 is basically the same as Example 1, except that:

[0057] A central buckle for a suspension bridge with a buffer and reset function, wherein the buffer assembly 3 includes a disc spring assembly 31, a disc spring shaft 32, a washer 33, and a retaining ring 34. The disc spring assembly 31 is provided on the side of the disc spring shaft 32. One end of the side of the disc spring shaft 32 is connected to one end of the washer 33, and the other end of the disc spring shaft 32 is connected to one end of the retaining ring 34. The retaining ring 34 is connected to the upper connecting rod 2. The disc spring shaft 32 includes an end face base 321, a round shaft 322, and a protective sleeve 3. 23. One end of the round shaft 322 is connected to the side of the end face base 321. The side of the end face base 321 is provided with a protective sleeve 323 on the outside of the round shaft 322. The protective sleeve 323 is embedded in the slot 51. The disc spring assembly 31 is provided on the side of the round shaft 322. The other end of the round shaft 322 is provided with a nut 36. The retaining ring 34 is connected and fixed to the round shaft 322 by the nut 36. A washer 35 is provided between the nut 36 and the retaining ring 34.

[0058] Due to the large stiffness, strong shock absorption capacity, and ability to withstand large loads with small deformation, disc springs are preferred as the buffer component. Simultaneously, because the central buckle bears a large load and deformation, a single disc spring cannot meet the requirements. Therefore, disc springs with larger diameters are selected, and composite disc spring groups 31 are formed by combining disc springs in pairs or stacks to meet the requirements of the central buckle in terms of force, stiffness, and deformation. The upper end of the round shaft 322 is provided with an external thread. The disc spring group 31 is coaxially arranged with the disc spring shaft 32, and the round shaft 322 serves as the disc spring group. The guide component 31, its clearance with the disc spring assembly 31 and its surface hardness should meet the requirements for disc spring use. The peripheral protective sleeve 323 prevents the disc spring assembly 31 from being contaminated by external debris and dust. The gasket 33, disc spring shaft 32 and disc spring assembly 31 all need to undergo surface strengthening treatment to meet the fatigue life requirements under variable load. The disc spring assembly 31 is pressed by the nut 36 to obtain a certain amount of pre-compression deformation to achieve the preset force required for the central buckle. After the pre-compression deformation reaches the requirement, another nut 36 is screwed in above the nut 36 for locking and anti-loosening.

[0059] The buffer assembly 3, as an independent structure, can easily achieve the required preload by the preload deformation of the disc spring assembly 31 when the nut 36 is locked. This preload can be assembled, adjusted and tested in the factory, thereby reducing the workload of on-site installation and ensuring the accuracy of the preload.

[0060] Example 3:

[0061] Example 3 is basically the same as Example 1, except that:

[0062] A central fastener for a suspension bridge with a buffer reset function includes multiple sets of screw assemblies 4 arranged around a gap area 52. Each set of screw assemblies 4 includes two locking nuts 41, two locking washers 42, and a double-ended stud 43. Two circumferential flanges 54 are provided on opposite sides of the upper connecting rod 2 and the lower connecting rod 5. Each of the two circumferential flanges 54 has a through-hole 53 on its side. The two ends of the double-ended stud 43 pass through the two through-holes 53 and extend to the outside of the circumferential flange 54. The end of the double-ended stud 43 located on the outside of the circumferential flange 54 is fixed by a locking nut 41. A proximity switch 7 is installed on the circumferential flange 54 inside the through-hole 53, and the proximity switch 7 is located outside the double-ended stud 43. A bushing 44 is provided on the circumferential flange 54 inside the through-hole 53. The two ends of the double-ended stud 43 pass through the two bushings 44 and extend to the outside. The double-ended stud 43 and the bushing 44 are clearance-fitted.

[0063] The bushing 44 is a self-lubricating bushing. The bushing 44 and the double-ended stud 43 are clearance-fitted, with a diameter clearance of 0.1-0.2mm, to facilitate the smooth sliding of the double-ended stud 43 and prevent corrosion at the screw assembly 4 and the circumferential flange. The bushing 44 is inserted into the hole of the circumferential flange. The pre-tightened buffer assembly 3 is placed into the lower connecting rod 5. After the double-ended stud 43, locking washer 42, and locking nut 41 are inserted into the circumferential flange 54, the locking nut 41 is screwed until it fits against the surface of the circumferential flange 54, completing the connection between the upper connecting rod 2 and the lower connecting rod 5. This connection type allows the screw assembly to reliably guide the connection between the upper connecting rod 2 and the lower connecting rod 5, while also allowing the double-ended stud 43 to slide in the bushing 44. This ensures that both the upper connecting rod 2 and the lower connecting rod 5 on both sides can compress the disc spring assembly 31 and the two rings under overload. When the distance between flanges 54 decreases, the flanges slide axially. Adjust the proximity switch 7 so that when the central buckle is overloaded and the axial distance between the upper connecting rod 2 and the lower connecting rod 5 changes, the proximity switch 7 can issue an alarm signal. When selecting the combination of disc spring group 31, the strength must meet the ultimate load requirements under strong earthquake and strong external force. The axial displacement generated by compression under the ultimate load should not damage the proximity switch 7. When the bridge is in normal working condition, the load transmitted by each component of the central buckle is within the normal design load range. By applying a certain amount of pre-compression deformation to the disc spring group 31 in the buffer assembly 3, the amount of pre-compression deformation corresponds to the normal design load of the central buckle or is slightly greater than the normal design load as required by the design. In this way, when working normally, the load on the disc spring group 31 does not exceed its pre-tightening force, the disc spring group 31 is not compressed, and there is no axial displacement between the upper connecting rod 2 and the lower connecting rod 5.

[0064] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A central buckle for a suspension bridge with a buffer reset function, characterized in that... The central buckle of the suspension bridge with buffer reset function includes two central buckle components (A), cable clamps (B) and main truss (C). The bottom of the cable clamp (B) is connected to one end of each of the two central buckle components (A), and the other end of the two central buckle components (A) is connected to the main truss (C). The two central buckle components (A) are symmetrically inclined with the cable clamp (B) as the center. The central buckle assembly (A) includes an upper hanging lug plate (1), an upper connecting rod (2), a buffer assembly (3), a screw assembly (4), a lower connecting rod (5), and a lower hanging lug plate (6). One end of the upper connecting rod (2) is inserted into the upper hanging lug plate (1), and one end of the lower connecting rod (5) is inserted into the lower hanging lug plate (6). A gap area (52) is provided between the other end of the upper connecting rod (2) and the other end of the lower connecting rod (5). Multiple sets of screw assemblies (4) are provided in the gap area (52) between the upper connecting rod (2) and the lower connecting rod (5). A buffer assembly (3) is provided inside the multiple sets of screw assemblies (4) in the gap area (52). The two ends of the buffer assembly are connected to the upper connecting rod (2) and the lower connecting rod (5) respectively. A proximity switch (7) is provided in the gap area (52), and the proximity switch (7) is located on the outside of the screw assembly (4); The lower connecting rod (5) has a slot (51) on its side, the buffer assembly (3) is installed in the slot (51), and one end of the lower lifting ear plate (6) is inserted into the slot (51). The buffer assembly (3) includes a disc spring assembly (31), a disc spring shaft (32), a gasket (33) and a retaining ring (34). The disc spring assembly (31) is provided on the side of the disc spring shaft (32). One end of the side of the disc spring shaft (32) is connected to one end of the gasket (33), and the other end of the disc spring shaft (32) is connected to one end of the retaining ring (34). The retaining ring (34) is connected to the upper connecting rod (2). The disc spring shaft (32) includes an end face base (321), a round shaft (322) and a protective sleeve (323). One end of the round shaft (322) is connected to the side of the end face base (321). The side of the end face base (321) is located outside the round shaft (322) and a protective sleeve (323) is provided. The protective sleeve (323) is embedded in the slot (51). The disc spring assembly (31) is set on the side of the round shaft (322). The upper hanging ear plate (1) and the lower hanging ear plate (6) have the same structure, and the upper hanging ear plate (1) and the lower hanging ear plate (6) are symmetrically arranged.

2. The central buckle of a suspension bridge with buffer reset function according to claim 1, characterized in that: The lower hanging lug (6) includes a working end (61), a connecting end (62) and an insertion end (63). One end of the insertion end (63) is installed in the slot (51), and the other end of the insertion end (63) extends to the outside of the slot (51) and connects to one end of the connecting end (62). The other end of the connecting end (62) is connected to one end of the working end (61).

3. The central buckle of a suspension bridge with buffer reset function according to claim 1, characterized in that: The other end of the round shaft (322) is provided with a nut (36), and the retaining ring (34) is connected and fixed to the round shaft (322) through the nut (36).

4. The central buckle of a suspension bridge with buffer reset function according to claim 3, characterized in that: A washer (35) is provided between the nut (36) and the retaining ring (34).

5. The central buckle of a suspension bridge with buffer reset function according to claim 1, characterized in that: Multiple sets of the screw assemblies (4) are arranged around the gap area (52), and each set of screw assemblies (4) includes two locking nuts (41), two locking washers (42) and double-ended studs (43). Two circumferential flanges (54) are provided on opposite sides of the upper connecting rod (2) and the lower connecting rod (5); Both of the two circumferential flanges (54) have through holes (53) on their sides. The two ends of the double-ended stud (43) pass through the two through holes (53) and extend to the outside of the circumferential flange (54). The end of the double-ended stud (43) located on the outside of the circumferential flange (54) is fixed by a lock nut (41).

6. A central buckle for a suspension bridge with a buffer reset function according to claim 5, characterized in that: A proximity switch (7) is installed on the inner side of the through-hole (53) on the circumferential flange (54), and the proximity switch (7) is located on the outer side of the double-ended stud (43).

7. A central buckle for a suspension bridge with a buffer reset function according to claim 6, characterized in that: A bushing (44) is provided on the circumferential flange (54) inside the through-hole (53). The two ends of the double-ended stud (43) pass through the two bushings (44) and extend to the outside. The double-ended stud (43) and the bushing (44) are in clearance fit.

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